Acid wool dyestuffs of the anthraquinone series



ACID WOOL DYEST UFFS OF THE ANTHRAQUINQNE SERIES Josef-Singer, Heinz-Werner Schwechten, and Otto Bayer, Leverkusen-Bayerwerk, Germany, assiguors to Farbenfabriken Bayer, Aktiengesellschaft, Leverknsen, Germany NoDrawing, ApplicationAprii 8, 1953, SerialNo. 347,616-

Claims priority, application rGermany April 18,1952

"13 Claims. (Cl. Zeta-371) Thetpresent, invention relates to new acid wool dyestuffs of the anthraquinone series and to a process of producing. such; dyestuffs.

, In, accordance .with.the invention we have found that valuable-new-acid wool dyestuffs are obtained by.-reacting r 1famino-4-bromoranthraquinone-Lsulfonic' .acid and hydroaromatic diamines containing at least one amino group attachedto the hydrogenated nucleus so that only one amino group of the diamines takes part in the reaction. Examples of diamines containing from 6 to at most 12 cyclic carbon atoms and containing no olefinic double bonds are 'hexahydrophenylene diamines and theirderivatives containing alkyl groups attached to the, nucleus, hexahydro and perhydro-diamino-diphenyls such as? hexahydro-benzidine and perhydro-benzidine, tetrahydroand dekahydro-naphthylene diamines such as dekahydro-l.S-naphthylenodiamine, hexahydroandperhydro-diamino-diphenylmethanes, and hexahydro aminodiphenyl amines; Suitable monoacyl derivatives are the reaction products of the said diamines andacylating agents such as carboxylic acid chlorides, sulfochlorides and;:heterocyclic. halogen compounds, which react; like acidchlorides, for instance cyanuricchloride.

@When the reaction: is performed with nonracylated diamines; products; containing a free amino group: are obtained, which; are. either; acylated subsequently. or into which alkyl radicals containing sulfonic acid groups are introduced for instancerby reaction with fi-chloro-ethane sulfonic;v acid or: butane sulfone. .These acylateddyes'tufis:maytalso'beobtained by: reacting l-amino-A-bromoanthraquinone-Z-sulfonic acid and the monoacyhderiva' tivesofl-the; above mentioned diamines. If: the 'diamines employedin; thereaction contain a non-hydrogenated aromatic nucleus (for instance, hexahydrobenzidinei and tetrahydronaphthylene-diamines), sulfonic .acid; groups may be introduced; into; the resultingdyestufi. In-this 'ice 2 2 -sulfonic acid' a 'wool dyestuifis obtained -which,-besides equal clearness and'fastness' to light ofthe dyeings produced from the reaction product from hexahydroaniline and 1' amino-4-bromoanthraquinone-Z-sulfonic acid, is distinguished by excellent levelling properties; Onthe other hand, thewool-dyestuif prepared-similarly by acylation with the acyl chloride-of 3-carboxy-benzene-sulfonic acid-2.5-dichloroanilide shows agood affinity for the wool fiber when dyeing from a-- neutral-bath-and good fastness'tomilling. It isfurther possible to introduce acyl radicals which allow to perform further reactions.

For instance, by treatment with diketene, aceto-acetyl' d'erivatives are obtained, which can be coupled with diazo compounds; furthermore, acid radicals containing chromable groups may be employed; which, allow toprod'uce chrome dyestufis;

' iThe'newdyestuifs'; obtained accordingto the invention correspond to the formula Y means a hydrogenated, aromatic radicalcontainingvno case it is of advantage to, introduce the acyl groups after sulfonation.

It is also within the scope to produce the new acid wool dyestuffs by reacting 1-amino-2.4-dibromo-anthraquinone and the above said diamines and replacing the bromine in 2-position by the sulfonic acid group by treatment with sulfite.

. The compounds obtained'according to theinvention represent, valuable wool dyestuffs, especially those. which carry a freeamino groupand, therefore,; permit to carry out a varietybf: reactions leading to. dyestuffs which possess dyeing properties varying within a wide. range while the clear shade and fastness to light of. the; dye;- ings obtainedtherewith are preserved.- This offiersthe possibility to produce dyestufls yielding clear dyeings which are fast to light and having for instance good levelling strength, good..,afiinity for the. fiber when dyeing from a neutral bath, respectively, and good fastness to milling. For instance,; by introducing acetyl groups into the product prepared by reacting hexahydro polefinic doublebonds, the 4-amino-,a'nthraquinone group being attached to a hydrogenated nucleus of said radical Y; Y shall contain from 6- to 12*cyclic carbon atoms; in-particular Y'stands for and phenylene-diamine andl-amino-4-bromo-anthraquinonefonic-acidgroup as substitu'ent;

' The-new dyestuffs are distinguished in general'by-very good solubility; thedyeingsproduced therefrom are extra-ordin'arily clear and very fast" to' light. They are suitable inter 'alia for dyeing-wool; silk and other animal fibers as well as for dyeingsynthetic fibers such as fibers from polyamides. I

The invention is further illustrated by the following examples without being" restricted thereto; theparts-*being lay-weight.

Example I 40 parts of the sodium salt of 1-amino-4-bron1o-anthraquinone-Z-sulfonic acid, 25 parts of hexahydro-p-phenylene-diamine, parts of sodium hydroxide and 1.5 parts of cuprous chloride are mixed with stirring in 200 parts of water at 50-70" C. for some time. After completion of the reaction the solution is adjusted weakly acid, the precipitated dyestutf is isolated and washed with hot water. The product is purified by dissolving in 1500 parts of water and parts of sodium hydroxide, reprecipitated by neutralization, isolated and washed with hot water.

Upon addition of sodium chloride the sodium salt of the dyestufi is separated from the alkaline solution. When dyeing with the addition of levelling agents the dyestufi yields on wool clear reddish-blue shades.

Example 2 21 parts of the dyestufi obtained as described in Example l are dissolved in 350 parts of water and 7 parts of acetic anhydride until acetylation is complete. The reaction product is separated by addition of sodium chloride, suction filtered, washed with sodium chloride solution and dried.

The blue dyestulf obtained is excellently soluble in water and possesses excellent levelling properties, good coloring strength and good fastness to light.

By analogous treatment of the reaction product prepared from l-amino-4-bromo-anthraquinone-2-sulfonic acid and hexahydro-p-phenylene-diamine with propionic anhydride a dyestuft' with similar properties is obtained.

By treatment with hexahydrobenzoyl-chloride a dye stulf is obtained which, as compared with the acetyl derivative, shows an improved fastness to wet processing and is very suitable for dyeing in the cold.

When .undecylenic acid chloride is employed as acylating agent a dyestutf is obtained which is suitable for dyeing from a neutral bath. Furthermore the chlorides of 3-carboxy-benzene-sulfonic acid-2'.5'-dichloroanilide of 3-carboxy benzene-sulfonic acid-2.4'.5'-trichloroanilide, 3-carboxy-benzene-sulfonic acid-2'.5-dichlor0anilide of carboxy-benzene-3.S-disulfonic acid dianilidc and of pisooctyl-phenoxyacetic acid may be used as acylating agents, yielding dyestuffs with similar properties.

Example 3 21 parts of the dyestufl obtained as described in Ex ample l and 6 parts of sodium hydroxide are mixed with stirring at room temperature in 600 parts of water with parts of diphenyl-4-sulfochloride.

The reaction is completed by heating to about 40 C.; the solution is then neutralized and the resulting diphenylsulfamide is isolated by addition of sodium chloride.

The dyestuff of Example 1 may be acylated in analogous manner with other sulfochlorides such as p-toluenesulfochloride, 4-chlorobenzenc-sulfochloridc, 3-nitrobenzene-sulfochloride naphthalene-lor 2-sulfochloride and anthraquinone-Z-sulfochloride. In all these cases dyestuffs having good aifinity for the wool fiber are obtained; some of the resulting dyestuffs may be used for dyeing from a neutral bath.

Example 4 42 parts of the dyestuff obtained as described in Example l, 10 parts of sodium hydroxide and 15 parts of soda are reacted with ice cooling in 600 parts of water with 40 parts of the sodium salt of naphthalene-Z-sulfochloride-sulfonic acid (prepared according to Example 1 of German Patent 719,598). After completion of the reaction and isolation as usual an easily levelling dyestuif of good fastness to wet processing is obtained.

Example 5 3 parts of the dyestuif obtained as described in Example l are dissolved in 100 parts of n/S-sodium hydroxide solution and intensely stirred for sometime with 4 a solution of 1 part of phenyl isocyanate in 5 parts of acetone and little pyridine. The acetone is then distilled off and the residue is isolated as usual by addition of salt. A readily levelling blue wool dyestulf is obtained.

Example 6 20 parts of the sodium salt of 1-amino-4-bromo-anthraquinone-Z-sulfonic acid and 15 parts of hexahydrobenzidine are heated to the boil while stirring in 300 parts of water and parts of ethanol with 1 part of copper sulfate and 10 parts of sodium carbonate.

The reaction product precipitates in the form of blue needles. When the reaction is complete the mixture is cooled, adjusted weakly acid and the dyestufi is isolated.

The dyestuff can be purified by redissolution from 500 parts of water and 4 parts of sodium hydroxide.

The dyestuif dyes wool in clear greenish-blue shades, as described in Example 1.

By acetylation an easily levelling dyestufi dyeing wool in greenish-blue shades is obtained.

By sulfonation with concentrated sulfuric acid or weak fuming sulfuric acid a levelling dyestufl is obtained, which is fast to milling. By acetylating this sulfonated product a readily levelling wool dyestufi of good fastness to light is obtained.

Example 7 20 parts of the sodium salt of 1-amino-4-bromoanthraquinone-Z-sulfonic acid and 20 parts of dekahydronaphthalene-1.5-diamine are mixed with stirring at 50 C. in 200 parts of water with 1 part of cuprous chloride and 3 parts of sodium hydroxide until the presently occurring blue coloration no longer changes. The dyestulf formed is isolated and, if necessary, purified according to Example 1.

After acylation as described in the preceding examples valuable blue dyestulfs having difierent dyeing properties are obtained.

Example 8 10 parts of the sodium salt of 1-amino-4-bromo anthraquinone-Z-sulfonic acid and 10 parts of 4.4-(diaminocyclohexyl)-methyl-methane are heated in 100 parts of Water and 40 parts of methanol with 1 part of copper sulfate and 1.5 parts of sodium hydroxide to 70-75" C. for some hours.

When the blue coloration occurring soon no longer changes the dyestufi formed is precipitated by neutralizing with mineral or acetic acid and purified according to Example 1.

By acetylation a blue wool dyestulf is obtained which yields dyeings fast to wet processing and which may be dyed from a neutral bath.

We claim:

1. New compounds of the general formula i) NH-Y-NHR wherein R stands for a radical selected from the group consisting of H and acyl, and Y stands for a hydrogenated aromatic radical containing from 6 to at most 12 cyclic carbon atoms and being free from olefinic double bonds, the 4-aminoanthraquinone group being attached to a hydrogenated nucleus of said radical Y.

2. New compounds of the general formula (I) NHr SOa ele rm h group q t n i a wherein" R stands for a'r a'dicab'selectedfro'zn th g oup consisting off H1 and acyl, tand Y'isstandszjor a. radical and the 4amino anthraquinone group being attached to a hydrogenated nucleus of said radical Y.

3. As new compound 0 NHI 4. As new compound l mnofi 5. As new compound 6. As new compound t (m-smrr run-@NH:

"M w 9 mins o t: um i 8. The process for the 'production ofinew:anthraquinone compounds comprising reacting at temperatures up to about 100 C. 1amino-4bromoanthraquinone-Z-sulfonic acid with a compoundrof the general formula wherein Y stands for a hyd'rogenated aromatic radical containing from 6 to at most 12 cyclic carbon atoms and being free from olefinic double bonds.

9. The process for the production of new anthraquinone compounds comprising reacting at temperatures up to about 100 C. 1-amin0-4-bromoanthraquinone-2-sulfonic acid with a compound of the general formula F se and acylating the obtained 1.4-diamino anthraquinone derivative with a compound selected from the group consisting of carboxylic acid halides and sulfonic acid halides. a 11. The process for the production of a new anthraquinone compound comprising reacting at temperatures up to about C. l-amino-4-bromoanthraquinone-2- sulfonic acid with 1.4-diamino cyclohexane and acylating the obtained 1.4-diamino-authraquinone derivative with acetyl chloride.

12. The process for the production of a new anthra' quinone compound comprising reacting at temperatures up to about 100 C. l-amino-4-bromoanthraquinone-2- sulfonic acid with 1.4-diamino cyclohexane and acyiating the obtained 1.4-diamino-anthraquinone derivative with naphthalene-Z-sulfochloride.

13. Compounds of the formula in which R is a monovalent radical.

References Cited in the file of this patent UNITED STATES PATENTS Wernand ct al. Jan. 12, 1937 Kern Nov. 11, 1947 Von Allmen et a1. Nov. 9, 1948 Von Allmen et a1 Aug. 8, 1950 Von Allmen et a1. Feb. 13, 1951 Von Allmcn et a]. Nov. 4, 1952 Von Allmen et al. Nov. 17, 1953 FOREIGN PATENTS Germany Mar. 23, 1933 

1. NEW COMPOUNDS OF THE GENERAL FORMULA 